diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index 5e7eea2..78b18a6 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1750,6 +1750,7 @@
 	n->start = start;
 	n->end = end;
 	mpol_get(pol);
+	pol->flags |= MPOL_F_SHARED;	/* for unref */
 	n->policy = pol;
 	return n;
 }